Documentation
¶
Overview ¶
Package sliceop provides operations on slices not available in the stdlib slices package.
Index ¶
Examples ¶
Constants ¶
This section is empty.
Variables ¶
This section is empty.
Functions ¶
func Filter ¶
Filter creates a slice with all the elements x_i of src for which f(x_i) is true. Filter uses dst as work buffer, storing elements at the start of the slice. Filter clears dst if a slice is passed, and allocates a new slice if dst is nil.
Example ¶
An example of slice filtering
package main
import (
"fmt"
"go-hep.org/x/hep/sliceop"
)
func main() {
slice := []float64{1, 2, -99, 4, 5, -99, 7}
condition := func(x float64) bool { return x > 0 }
fmt.Println(sliceop.Filter(nil, slice, condition))
}
Output: [1 2 4 5 7]
func Find ¶
Find creates a slice with all indices corresponding to elements for which f(x) is true. Find uses dst as work buffer, storing indices at the start of the slice. Find clears dst if a slice is passed, and allocates a new slice if dst is nil.
Example ¶
An example of slice finding
package main
import (
"fmt"
"go-hep.org/x/hep/sliceop"
)
func main() {
slice := []float64{1, 2, -99, 4, 5, -99, 7}
condition := func(x float64) bool { return x == -99 }
fmt.Println(sliceop.Find(nil, slice, condition))
}
Output: [2 5]
func Map ¶
func Map[T, U any](dst []U, src []T, f func(v T) U) []U
Map creates a slice with all the elements f(x_i) where x_i are elements from src. Map uses dst as work buffer, storing elements at the start of the slice. Map allocates a new slice if dst is nil. Map will panic if the lengths of src and dst differ.
Example ¶
An example of slice mapping
package main
import (
"fmt"
"go-hep.org/x/hep/sliceop"
)
func main() {
slice := []float64{1, 2, -99, 4, 5, -99, 7}
operation := func(x float64) float64 { return x * x }
fmt.Println(sliceop.Map(nil, slice, operation))
}
Output: [1 4 9801 16 25 9801 49]
func Resize ¶ added in v0.33.0
Resize returns a slice of size n, reusing the storage of the provided slice, appending new elements if the capacity is not sufficient.
Example ¶
An example of resizing a slice.
package main
import (
"fmt"
"go-hep.org/x/hep/sliceop"
)
func main() {
slice := []int{1, 2, 3, 4}
fmt.Printf("slice: len=%d, cap=%d, vs=%v\n", len(slice), cap(slice), slice)
slice = sliceop.Resize(slice, 8)
fmt.Printf("slice: len=%d, cap=%d, vs=%v\n", len(slice), cap(slice), slice)
slice = sliceop.Resize(slice, 3)
fmt.Printf("slice: len=%d, cap=%d, vs=%v\n", len(slice), cap(slice), slice)
}
Output: slice: len=4, cap=4, vs=[1 2 3 4] slice: len=8, cap=8, vs=[1 2 3 4 0 0 0 0] slice: len=3, cap=8, vs=[1 2 3]
func Take ¶
Take creates a sub-slice of src with all elements indiced by the provided indices. Take uses dst as work buffer, storing elements at the start of the slice. Take clears dst if a slice is passed, and allocates a new slice if dst is nil. Take will panic if indices is not sorted or has duplicates. Take will panic if length of indices is larger than length of src. Take will panic if length of indices is different from length of dst.
Example ¶
An example of taking a sub-slice defined by indices
package main
import (
"fmt"
"go-hep.org/x/hep/sliceop"
)
func main() {
slice := []float64{1, 2, -99, 4, 5, -99, 7}
indices := []int{2, 5}
fmt.Println(sliceop.Take(nil, slice, indices))
}
Output: [-99 -99]
Types ¶
This section is empty.
Source Files
Directories